20 lines
521 B
Markdown
20 lines
521 B
Markdown
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---
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title: Give Sibling Elements a Unique Key Attribute
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localeTitle: 为兄弟元素提供唯一的键属性
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---
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## 为兄弟元素提供唯一的键属性
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## 暗示
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它与之前的[挑战](https://learn.freecodecamp.org/front-end-libraries/react/use-array-map-to-dynamically-render-elements)几乎相同。只需要添加`key`属性。
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## 解
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只需将`key`属性添加到`<li>`标记即可使其唯一
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```react.js
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const renderFrameworks = frontEndFrameworks.map((item) =>
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<li key={item+1}>{item}</li>
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);
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```
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